Casein Protein

Casein is a slow-digesting protein derived from milk that forms curds when exposed to stomach acid. Unlike whey protein, which is absorbed quickly, casein creates a gel-like substance in the digestive system, releasing amino acids gradually over several hours. This makes it particularly suited to situations where sustained protein delivery is desired, such as between meals or before sleep.

Casein differs from whey protein in digestion speed, cost, and texture. Whey is faster-acting and more soluble, making it popular for post-workout consumption, whilst casein's slower release suits those seeking prolonged satiety or steady muscle protein synthesis throughout extended periods without food. Both come from milk, though casein comprises roughly 80 per cent of milk's protein content compared to whey's 20 per cent.

Casein typically appeals to strength athletes, those managing hunger between meals, and people following calorie-restricted diets where extended satiety is valuable. Some consumers use it as a nighttime supplement to support muscle recovery during sleep.

When comparing casein products, examine protein content per serving, which typically ranges from 20 to 30 grams. Check the ingredient list for additives, thickeners, and artificial sweeteners. Consider the source-some products use micellar casein, which retains a more natural structure, whilst others use casein hydrolysate, which digests slightly faster. Price per kilogram varies considerably, so calculate cost relative to protein yield rather than package price alone.